212 Systematic Paleontology 



Favosites conicus Hall 

 Plate XXIII, Figs. 5-7 



Favosites conica Hall, 1874, 21st Rept. N. Y. State Mus., p. 112. 



Favosites conica Hall, 1879, 32d Rept. N. Y. State Mus., p. 146. 



Favosites conicus Hall, 1883, Rept. State Geol. N. Y. for 1882, pi. iii, figs. 4, 



6-13. 

 Favosites conicus Hall, 1887, Pal. N. Y., vol. vi, p. 9, pi. iii, figs. 4, 6-13. 

 Favosites conicus Girty, 1895, 48tli Rept. N. Y. State Mus. for 1894, vol. 11, 



p. 302. 



Description. — " Corallum forming conical mas.ses ; flattened at the base, 

 which is covered by a strong eiDitheca, marked with concentric wrinkles 

 and undulations and radiating undulations formed by the cell tubes. 

 Cells arising from the center of the base from an undefined central axis 

 and quite abruptly curving to the surface, increasing by interstitial ad- 

 ditions; polygonal, from four to eight sided; diameter at the surface vary- 

 ing from 1.5 to 3.5 mm.; walls comparatively strong; interior with evi- 

 dences of numerous spinules or small nodes. Septa of about the same 

 strength as the walls, irregularly arranged, varying from eight to fifteen 

 in the space of 10 mm. Mural pores comparatively large, circular, with 

 distinctly elevated margins, disposed in one, two and sometimes three 

 ranges. Where one or two ranges occur the pores are regularly arranged 

 one above the other; where three ranges occur the disposition is more 

 irregular." Hall, 1887. 



Longer diameter of corallum 60 mm. 



Specimens agree well with those from the Helderberg of New York. 



Occurrence. — Helderberg Formation, New Scotland Member. 

 Cherry Run, West Virginia. Becraft Member. Baltimore and Ohio 

 Railroad cut through North Mountain 1 mile west of North Mountain 

 Station, abundant. Oriskany Formation, Ridgely ]\Iember. Cumber- 

 land ; Knobly Mountain near Cumberland. 



Collections. — Maryland Geological Survey, U. S. National ^luseum. 



Favosites basalticus Goldfuss 

 Plate XXIII, Figs. 5-7 



Calamopora basaltica Goldfuss, 1829, Petrefacta Germanise, vol. i, p. 78, pi. 



xxvi, fig. 4o (in part). 

 Favosites Gothlandica Billings, 1859. Canadian Jour., n. s., vol. iv, p. 104. 



figs. 2, 3, 4. 



